RFR(S) 8226953: AOT: assert(oopDesc::is_oop(obj)) failed: not an oop

[Igor Veresov]

This is a port of https://github.com/oracle/graal/commit/7598eb1426fbfc98ef6298b81d108f2b33a47823 <https://github.com/oracle/graal/commit/7598eb1426fbfc98ef6298b81d108f2b33a47823> that we’d like to get in before the next Graal update to reduce the noise in testing.
Webrev: http://cr.openjdk.java.net/~iveresov/8226953/webrev.00/ <http://cr.openjdk.java.net/~iveresov/8226953/webrev.00/>

Thanks,
igor